clutil refactor (#2733)

* cleaup clutil.h

* clutil.c -> clutil.cc

* std::hash

* try simplify functions

* using namespace group help functions

* continue

* add function get_platform_info

* continue

* remove caching

* struct CLContext

* std::cout & CL_ERR_TO_STR

* remove CLU_NO_CACHE

* Revert "struct CLContext"

This reverts commit 882e413f227e4c1ba4bb83f956cc67739a189221.

* cl_get_error_string : remove undefied error codes

* replace all printf with std::cout

* util::read_file

* cleanup

* revert CL_ERR_TO_STR

* simplify

* add macro CL_ERR_TO_STR

* cl_get_error_string: fix undeclared errors

* log_size should not +1

* use std::stirng log

* apply review

selfdrive/common/SConscript

@@ -12,14 +12,13 @@ _visionipc = fxn('visionipc', ['visionipc.c', 'ipc.c'])
 
 files = [
   'buffering.c',
-  'clutil.c',
+  'clutil.cc',
   'efd.c',
   'glutil.c',
   'visionimg.cc',
 ]
 
 if arch == "aarch64":
-  defines = {}
   files += [
     'framebuffer.cc',
     'touch.c',
@@ -30,17 +29,15 @@ if arch == "aarch64":
     files += ['visionbuf_ion.c']
   _gpu_libs = ['gui', 'adreno_utils']
 elif arch == "larch64":
-  defines = {"CLU_NO_CACHE": None}
   files += [
     'visionbuf_ion.c',
   ]
   _gpu_libs = ['GL']
 else:
-  defines = {"CLU_NO_CACHE": None}
   files += [
     'visionbuf_cl.c',
   ]
   _gpu_libs = ["GL"]
 
-_gpucommon = fxn('gpucommon', files, CPPDEFINES=defines, LIBS=_gpu_libs)
+_gpucommon = fxn('gpucommon', files, LIBS=_gpu_libs)
 Export('_common', '_visionipc', '_gpucommon', '_gpu_libs')